66885523372 has 24 divisors (see below), whose sum is σ = 118239438240. Its totient is φ = 33104490240.

The previous prime is 66885523351. The next prime is 66885523381. The reversal of 66885523372 is 27332558866.

66885523372 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46747 + ... + 368722.

It is an arithmetic number, because the mean of its divisors is an integer number (4926643260).

Almost surely, 2^66885523372 is an apocalyptic number.

It is an amenable number.

66885523372 is a deficient number, since it is larger than the sum of its proper divisors (51353914868).

66885523372 is a wasteful number, since it uses less digits than its factorization.

66885523372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415881 (or 415879 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 55.

The spelling of 66885523372 in words is "sixty-six billion, eight hundred eighty-five million, five hundred twenty-three thousand, three hundred seventy-two".